I also did side by side comparisons per say.
Two separate towers same height 55'.
Different stations to the North, West and South. Distances of 20 miles to 45 miles. All tests were performed within a few minutes of each other, 11pm at night no DX was noticed.
All three stations did not notice any difference of the two antennas.
I think the Imax received just a little better than the A99, as the A99 had more ground noise.
Neither antenna had any ground radials and both had rf chokes at the feed point. Ugly Balun.
I have used both verticals on 10/11/12/15 meters and both worked well, no antenna coupler required.
Two separate towers same height 55'.
Different stations to the North, West and South. Distances of 20 miles to 45 miles. All tests were performed within a few minutes of each other, 11pm at night no DX was noticed.
All three stations did not notice any difference of the two antennas.
I think the Imax received just a little better than the A99, as the A99 had more ground noise.
Neither antenna had any ground radials and both had rf chokes at the feed point. Ugly Balun.
I have used both verticals on 10/11/12/15 meters and both worked well, no antenna coupler required.